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December 25th, 2013, 12:04 PM   #1
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I Ride: 2011 FS570, 2012 KTM 250 XC-W
Who can fix the suspension on my 11 FS570?

I have an 11 FS570 SM I purchased new in spring 2012 for street riding only. The suspension is totally rigid on this thing. I am supposedly the target weight of 185 pounds. I have played with the clickers and sag to no avail. I am currently full out on compression and rebound with 100mm of sag. It is still mega harsh on the bumpy Connecticut roads. I realize the stock set up is for glass smooth race tracks at very high speed. That set up is bone jarring on regular roads and my back can't take the beating anymore. Otherwise it is an awesome handling machine with great power once derestricted.
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December 25th, 2013, 01:02 PM   #2
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Re: Who can fix the suspension on my 11 FS570?

I have the same problem on mine that shock spring is ridiculous.I once had about 60 lbs of groceries in my back pack and it rode great.The right spring would make the seat bearable.MY forks loosened up over time and seem pretty good.Ithink the spring is shorter tan the fe spring and might be hard to find .Any body got the cure ? Thanks Skred
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December 25th, 2013, 02:31 PM   #3
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Re: Who can fix the suspension on my 11 FS570?

If the spring is shorter than the usual length, we ought to be able to cut a longer softer one. It's something like X percent shorter means also X percent stiffer. So it's easy to figure out what stiffness uncut spring you want to get a good rate after the cut.

But - i have seen it convincingly argued that the soft/stiff character of the suspension is more the suspension valving than the spring rate. DIY revalving should be possible, either "by ear" or with the help of Shim Restackor: http://shimrestackor.com
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December 25th, 2013, 02:48 PM   #4
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Re: Who can fix the suspension on my 11 FS570?

i'm sure that the suspension has also been serviced recently and pressure relieved, oil replaced, and mechanical elements found free of friction, etc.?
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December 26th, 2013, 12:26 AM   #5
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Re: Who can fix the suspension on my 11 FS570?

I have got a 2010 fs 570 and weigh only 60-62 kg (70+ with riding gear)
I set my suspension on "comfort" settings according to the manual this was good for me imo.
I had my forks serviced the beginning of this year and I also left my rear schock they just put 1-2mm less preload on the spring and now I'm using "normal" settings on the rear and comfort +1click extra preload on the front (on top of forks).
Still a little stiff for some bumpy roads but good on track
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December 26th, 2013, 06:56 AM   #6
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Re: Who can fix the suspension on my 11 FS570?

Springs hold the bike up for proper sag, valving dictates 'comfort'.

I think 100mm for street only is too much sag. Your rear spring is actually too soft.

The valving on the FS f/r is a little stiff, and the fork does loosen a slight amount as it miles in. The f/r is 20mm shorter than FE via use of spacers, not sure if they use a shorter spring or a different groove in the perch/tube.

I don't know the stock rate on the FS fork spring, but it is likely stiffer than the FE. A cut FE spring might turn from .44 to .45, which may work well for you. Any KTM/wp closed fork spring cut down will work for you, and allow for lots of rate choices.
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December 26th, 2013, 02:51 PM   #7
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Re: Who can fix the suspension on my 11 FS570?

wow I put 60 lbs in my back pack and the shock works.Thats a valve issue?Not likely lol
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December 27th, 2013, 05:18 PM   #8
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Re: Who can fix the suspension on my 11 FS570?

Originally Posted by Anthon Berg
i'm sure that the suspension has also been serviced recently and pressure relieved, oil replaced, and mechanical elements found free of friction, etc.?
I work on my own bikes and only have 700 miles on the berg. I also have a 2012 ktm 250 xc-w and I am almost tempted to take the fork and shock off that and use them on the berg. The 250's open cartridge forks and shock are spot on offroad for my weight. I believe offroad valving works great onroad. The 04 husky te 450 I previously owned and put marzocchi closed cartridge forks and an ohlins shock valved for woods was like a Cadillac on the street. Regarding the berg I was advised to try 100mm of sag and that resulted in a very slight improvement over the stock.
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December 28th, 2013, 11:46 AM   #9
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Re: Who can fix the suspension on my 11 FS570?

Originally Posted by skred
wow I put 60 lbs in my back pack and the shock works.Thats a valve issue?Not likely lol
Not looking to start a pissing contest. Glad it worked for you.
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December 28th, 2013, 11:53 AM   #10
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Re: Who can fix the suspension on my 11 FS570?

Originally Posted by kneehurts
Originally Posted by Anthon Berg
i'm sure that the suspension has also been serviced recently and pressure relieved, oil replaced, and mechanical elements found free of friction, etc.?
I work on my own bikes and only have 700 miles on the berg. I also have a 2012 ktm 250 xc-w and I am almost tempted to take the fork and shock off that and use them on the berg. The 250's open cartridge forks and shock are spot on offroad for my weight. I believe offroad valving works great onroad. The 04 husky te 450 I previously owned and put marzocchi closed cartridge forks and an ohlins shock valved for woods was like a Cadillac on the street. Regarding the berg I was advised to try 100mm of sag and that resulted in a very slight improvement over the stock.

The CC forks seem to hold through the midstroke better, but everyone seems to think they are not as plush as the OC forks

I don't think any of the KTM shocks will fit in our 09-11 70d Husas.

For dirt, the consensus seems to be 105-115mm sag for the PDS bikes. Any of the linkage bikes are around 100-105mm. For street, or some street, I think we are in trial and error mode for what works best. I think the SM guys are in the 70-80mm range, on lowered suspensions.
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